1 /*
2   Simple DirectMedia Layer
3   Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
4 
5   This software is provided 'as-is', without any express or implied
6   warranty.  In no event will the authors be held liable for any damages
7   arising from the use of this software.
8 
9   Permission is granted to anyone to use this software for any purpose,
10   including commercial applications, and to alter it and redistribute it
11   freely, subject to the following restrictions:
12 
13   1. The origin of this software must not be misrepresented; you must not
14      claim that you wrote the original software. If you use this software
15      in a product, an acknowledgment in the product documentation would be
16      appreciated but is not required.
17   2. Altered source versions must be plainly marked as such, and must not be
18      misrepresented as being the original software.
19   3. This notice may not be removed or altered from any source distribution.
20 */
21 
22 /**
23  *  \file SDL_stdinc.h
24  *
25  *  This is a general header that includes C language support.
26  */
27 
28 #ifndef SDL_stdinc_h_
29 #define SDL_stdinc_h_
30 
31 #include "SDL_config.h"
32 
33 #ifdef HAVE_SYS_TYPES_H
34 #include <sys/types.h>
35 #endif
36 #ifdef HAVE_STDIO_H
37 #include <stdio.h>
38 #endif
39 #if defined(STDC_HEADERS)
40 # include <stdlib.h>
41 # include <stddef.h>
42 # include <stdarg.h>
43 #else
44 # if defined(HAVE_STDLIB_H)
45 #  include <stdlib.h>
46 # elif defined(HAVE_MALLOC_H)
47 #  include <malloc.h>
48 # endif
49 # if defined(HAVE_STDDEF_H)
50 #  include <stddef.h>
51 # endif
52 # if defined(HAVE_STDARG_H)
53 #  include <stdarg.h>
54 # endif
55 #endif
56 #ifdef HAVE_STRING_H
57 # if !defined(STDC_HEADERS) && defined(HAVE_MEMORY_H)
58 #  include <memory.h>
59 # endif
60 # include <string.h>
61 #endif
62 #ifdef HAVE_STRINGS_H
63 # include <strings.h>
64 #endif
65 #ifdef HAVE_WCHAR_H
66 # include <wchar.h>
67 #endif
68 #if defined(HAVE_INTTYPES_H)
69 # include <inttypes.h>
70 #elif defined(HAVE_STDINT_H)
71 # include <stdint.h>
72 #endif
73 #ifdef HAVE_CTYPE_H
74 # include <ctype.h>
75 #endif
76 #ifdef HAVE_MATH_H
77 # if defined(__WINRT__)
78 /* Defining _USE_MATH_DEFINES is required to get M_PI to be defined on
79    WinRT.  See http://msdn.microsoft.com/en-us/library/4hwaceh6.aspx
80    for more information.
81 */
82 #  define _USE_MATH_DEFINES
83 # endif
84 # include <math.h>
85 #endif
86 #ifdef HAVE_FLOAT_H
87 # include <float.h>
88 #endif
89 #if defined(HAVE_ALLOCA) && !defined(alloca)
90 # if defined(HAVE_ALLOCA_H)
91 #  include <alloca.h>
92 # elif defined(__GNUC__)
93 #  define alloca __builtin_alloca
94 # elif defined(_MSC_VER)
95 #  include <malloc.h>
96 #  define alloca _alloca
97 # elif defined(__WATCOMC__)
98 #  include <malloc.h>
99 # elif defined(__BORLANDC__)
100 #  include <malloc.h>
101 # elif defined(__DMC__)
102 #  include <stdlib.h>
103 # elif defined(__AIX__)
104 #pragma alloca
105 # elif defined(__MRC__)
106 void *alloca(unsigned);
107 # else
108 char *alloca();
109 # endif
110 #endif
111 
112 /**
113  *  The number of elements in an array.
114  */
115 #define SDL_arraysize(array)    (sizeof(array)/sizeof(array[0]))
116 #define SDL_TABLESIZE(table)    SDL_arraysize(table)
117 
118 /**
119  *  Macro useful for building other macros with strings in them
120  *
121  *  e.g. #define LOG_ERROR(X) OutputDebugString(SDL_STRINGIFY_ARG(__FUNCTION__) ": " X "\n")
122  */
123 #define SDL_STRINGIFY_ARG(arg)  #arg
124 
125 /**
126  *  \name Cast operators
127  *
128  *  Use proper C++ casts when compiled as C++ to be compatible with the option
129  *  -Wold-style-cast of GCC (and -Werror=old-style-cast in GCC 4.2 and above).
130  */
131 /* @{ */
132 #ifdef __cplusplus
133 #define SDL_reinterpret_cast(type, expression) reinterpret_cast<type>(expression)
134 #define SDL_static_cast(type, expression) static_cast<type>(expression)
135 #define SDL_const_cast(type, expression) const_cast<type>(expression)
136 #else
137 #define SDL_reinterpret_cast(type, expression) ((type)(expression))
138 #define SDL_static_cast(type, expression) ((type)(expression))
139 #define SDL_const_cast(type, expression) ((type)(expression))
140 #endif
141 /* @} *//* Cast operators */
142 
143 /* Define a four character code as a Uint32 */
144 #define SDL_FOURCC(A, B, C, D) \
145     ((SDL_static_cast(Uint32, SDL_static_cast(Uint8, (A))) << 0) | \
146      (SDL_static_cast(Uint32, SDL_static_cast(Uint8, (B))) << 8) | \
147      (SDL_static_cast(Uint32, SDL_static_cast(Uint8, (C))) << 16) | \
148      (SDL_static_cast(Uint32, SDL_static_cast(Uint8, (D))) << 24))
149 
150 /**
151  *  \name Basic data types
152  */
153 /* @{ */
154 
155 #ifdef __CC_ARM
156 /* ARM's compiler throws warnings if we use an enum: like "SDL_bool x = a < b;" */
157 #define SDL_FALSE 0
158 #define SDL_TRUE 1
159 typedef int SDL_bool;
160 #else
161 typedef enum
162 {
163     SDL_FALSE = 0,
164     SDL_TRUE = 1
165 } SDL_bool;
166 #endif
167 
168 /**
169  * \brief A signed 8-bit integer type.
170  */
171 #define SDL_MAX_SINT8   ((Sint8)0x7F)           /* 127 */
172 #define SDL_MIN_SINT8   ((Sint8)(~0x7F))        /* -128 */
173 typedef int8_t Sint8;
174 /**
175  * \brief An unsigned 8-bit integer type.
176  */
177 #define SDL_MAX_UINT8   ((Uint8)0xFF)           /* 255 */
178 #define SDL_MIN_UINT8   ((Uint8)0x00)           /* 0 */
179 typedef uint8_t Uint8;
180 /**
181  * \brief A signed 16-bit integer type.
182  */
183 #define SDL_MAX_SINT16  ((Sint16)0x7FFF)        /* 32767 */
184 #define SDL_MIN_SINT16  ((Sint16)(~0x7FFF))     /* -32768 */
185 typedef int16_t Sint16;
186 /**
187  * \brief An unsigned 16-bit integer type.
188  */
189 #define SDL_MAX_UINT16  ((Uint16)0xFFFF)        /* 65535 */
190 #define SDL_MIN_UINT16  ((Uint16)0x0000)        /* 0 */
191 typedef uint16_t Uint16;
192 /**
193  * \brief A signed 32-bit integer type.
194  */
195 #define SDL_MAX_SINT32  ((Sint32)0x7FFFFFFF)    /* 2147483647 */
196 #define SDL_MIN_SINT32  ((Sint32)(~0x7FFFFFFF)) /* -2147483648 */
197 typedef int32_t Sint32;
198 /**
199  * \brief An unsigned 32-bit integer type.
200  */
201 #define SDL_MAX_UINT32  ((Uint32)0xFFFFFFFFu)   /* 4294967295 */
202 #define SDL_MIN_UINT32  ((Uint32)0x00000000)    /* 0 */
203 typedef uint32_t Uint32;
204 
205 /**
206  * \brief A signed 64-bit integer type.
207  */
208 #define SDL_MAX_SINT64  ((Sint64)0x7FFFFFFFFFFFFFFFll)      /* 9223372036854775807 */
209 #define SDL_MIN_SINT64  ((Sint64)(~0x7FFFFFFFFFFFFFFFll))   /* -9223372036854775808 */
210 typedef int64_t Sint64;
211 /**
212  * \brief An unsigned 64-bit integer type.
213  */
214 #define SDL_MAX_UINT64  ((Uint64)0xFFFFFFFFFFFFFFFFull)     /* 18446744073709551615 */
215 #define SDL_MIN_UINT64  ((Uint64)(0x0000000000000000ull))   /* 0 */
216 typedef uint64_t Uint64;
217 
218 /* @} *//* Basic data types */
219 
220 /* Make sure we have macros for printing 64 bit values.
221  * <stdint.h> should define these but this is not true all platforms.
222  * (for example win32) */
223 #ifndef SDL_PRIs64
224 #ifdef PRIs64
225 #define SDL_PRIs64 PRIs64
226 #elif defined(__WIN32__)
227 #define SDL_PRIs64 "I64d"
228 #elif defined(__LINUX__) && defined(__LP64__)
229 #define SDL_PRIs64 "ld"
230 #else
231 #define SDL_PRIs64 "lld"
232 #endif
233 #endif
234 #ifndef SDL_PRIu64
235 #ifdef PRIu64
236 #define SDL_PRIu64 PRIu64
237 #elif defined(__WIN32__)
238 #define SDL_PRIu64 "I64u"
239 #elif defined(__LINUX__) && defined(__LP64__)
240 #define SDL_PRIu64 "lu"
241 #else
242 #define SDL_PRIu64 "llu"
243 #endif
244 #endif
245 #ifndef SDL_PRIx64
246 #ifdef PRIx64
247 #define SDL_PRIx64 PRIx64
248 #elif defined(__WIN32__)
249 #define SDL_PRIx64 "I64x"
250 #elif defined(__LINUX__) && defined(__LP64__)
251 #define SDL_PRIx64 "lx"
252 #else
253 #define SDL_PRIx64 "llx"
254 #endif
255 #endif
256 #ifndef SDL_PRIX64
257 #ifdef PRIX64
258 #define SDL_PRIX64 PRIX64
259 #elif defined(__WIN32__)
260 #define SDL_PRIX64 "I64X"
261 #elif defined(__LINUX__) && defined(__LP64__)
262 #define SDL_PRIX64 "lX"
263 #else
264 #define SDL_PRIX64 "llX"
265 #endif
266 #endif
267 
268 /* Annotations to help code analysis tools */
269 #ifdef SDL_DISABLE_ANALYZE_MACROS
270 #define SDL_IN_BYTECAP(x)
271 #define SDL_INOUT_Z_CAP(x)
272 #define SDL_OUT_Z_CAP(x)
273 #define SDL_OUT_CAP(x)
274 #define SDL_OUT_BYTECAP(x)
275 #define SDL_OUT_Z_BYTECAP(x)
276 #define SDL_PRINTF_FORMAT_STRING
277 #define SDL_SCANF_FORMAT_STRING
278 #define SDL_PRINTF_VARARG_FUNC( fmtargnumber )
279 #define SDL_SCANF_VARARG_FUNC( fmtargnumber )
280 #else
281 #if defined(_MSC_VER) && (_MSC_VER >= 1600) /* VS 2010 and above */
282 #include <sal.h>
283 
284 #define SDL_IN_BYTECAP(x) _In_bytecount_(x)
285 #define SDL_INOUT_Z_CAP(x) _Inout_z_cap_(x)
286 #define SDL_OUT_Z_CAP(x) _Out_z_cap_(x)
287 #define SDL_OUT_CAP(x) _Out_cap_(x)
288 #define SDL_OUT_BYTECAP(x) _Out_bytecap_(x)
289 #define SDL_OUT_Z_BYTECAP(x) _Out_z_bytecap_(x)
290 
291 #define SDL_PRINTF_FORMAT_STRING _Printf_format_string_
292 #define SDL_SCANF_FORMAT_STRING _Scanf_format_string_impl_
293 #else
294 #define SDL_IN_BYTECAP(x)
295 #define SDL_INOUT_Z_CAP(x)
296 #define SDL_OUT_Z_CAP(x)
297 #define SDL_OUT_CAP(x)
298 #define SDL_OUT_BYTECAP(x)
299 #define SDL_OUT_Z_BYTECAP(x)
300 #define SDL_PRINTF_FORMAT_STRING
301 #define SDL_SCANF_FORMAT_STRING
302 #endif
303 #if defined(__GNUC__)
304 #define SDL_PRINTF_VARARG_FUNC( fmtargnumber ) __attribute__ (( format( __printf__, fmtargnumber, fmtargnumber+1 )))
305 #define SDL_SCANF_VARARG_FUNC( fmtargnumber ) __attribute__ (( format( __scanf__, fmtargnumber, fmtargnumber+1 )))
306 #else
307 #define SDL_PRINTF_VARARG_FUNC( fmtargnumber )
308 #define SDL_SCANF_VARARG_FUNC( fmtargnumber )
309 #endif
310 #endif /* SDL_DISABLE_ANALYZE_MACROS */
311 
312 #define SDL_COMPILE_TIME_ASSERT(name, x)               \
313        typedef int SDL_compile_time_assert_ ## name[(x) * 2 - 1]
314 /** \cond */
315 #ifndef DOXYGEN_SHOULD_IGNORE_THIS
316 SDL_COMPILE_TIME_ASSERT(uint8, sizeof(Uint8) == 1);
317 SDL_COMPILE_TIME_ASSERT(sint8, sizeof(Sint8) == 1);
318 SDL_COMPILE_TIME_ASSERT(uint16, sizeof(Uint16) == 2);
319 SDL_COMPILE_TIME_ASSERT(sint16, sizeof(Sint16) == 2);
320 SDL_COMPILE_TIME_ASSERT(uint32, sizeof(Uint32) == 4);
321 SDL_COMPILE_TIME_ASSERT(sint32, sizeof(Sint32) == 4);
322 SDL_COMPILE_TIME_ASSERT(uint64, sizeof(Uint64) == 8);
323 SDL_COMPILE_TIME_ASSERT(sint64, sizeof(Sint64) == 8);
324 #endif /* DOXYGEN_SHOULD_IGNORE_THIS */
325 /** \endcond */
326 
327 /* Check to make sure enums are the size of ints, for structure packing.
328    For both Watcom C/C++ and Borland C/C++ the compiler option that makes
329    enums having the size of an int must be enabled.
330    This is "-b" for Borland C/C++ and "-ei" for Watcom C/C++ (v11).
331 */
332 
333 /** \cond */
334 #ifndef DOXYGEN_SHOULD_IGNORE_THIS
335 #if !defined(__ANDROID__)
336    /* TODO: include/SDL_stdinc.h:174: error: size of array 'SDL_dummy_enum' is negative */
337 typedef enum
338 {
339     DUMMY_ENUM_VALUE
340 } SDL_DUMMY_ENUM;
341 #ifndef __ALIOS__
342 SDL_COMPILE_TIME_ASSERT(enum, sizeof(SDL_DUMMY_ENUM) == sizeof(int));
343 #endif
344 #endif
345 #endif /* DOXYGEN_SHOULD_IGNORE_THIS */
346 /** \endcond */
347 
348 #include "begin_code.h"
349 /* Set up for C function definitions, even when using C++ */
350 #ifdef __cplusplus
351 extern "C" {
352 #endif
353 
354 #ifdef HAVE_ALLOCA
355 #define SDL_stack_alloc(type, count)    (type*)alloca(sizeof(type)*(count))
356 #define SDL_stack_free(data)
357 #else
358 #define SDL_stack_alloc(type, count)    (type*)SDL_malloc(sizeof(type)*(count))
359 #define SDL_stack_free(data)            SDL_free(data)
360 #endif
361 
362 extern DECLSPEC void *SDLCALL SDL_malloc(size_t size);
363 extern DECLSPEC void *SDLCALL SDL_calloc(size_t nmemb, size_t size);
364 extern DECLSPEC void *SDLCALL SDL_realloc(void *mem, size_t size);
365 extern DECLSPEC void SDLCALL SDL_free(void *mem);
366 
367 typedef void *(SDLCALL *SDL_malloc_func)(size_t size);
368 typedef void *(SDLCALL *SDL_calloc_func)(size_t nmemb, size_t size);
369 typedef void *(SDLCALL *SDL_realloc_func)(void *mem, size_t size);
370 typedef void (SDLCALL *SDL_free_func)(void *mem);
371 
372 /**
373  *  \brief Get the current set of SDL memory functions
374  */
375 extern DECLSPEC void SDLCALL SDL_GetMemoryFunctions(SDL_malloc_func *malloc_func,
376                                                     SDL_calloc_func *calloc_func,
377                                                     SDL_realloc_func *realloc_func,
378                                                     SDL_free_func *free_func);
379 
380 /**
381  *  \brief Replace SDL's memory allocation functions with a custom set
382  *
383  *  \note If you are replacing SDL's memory functions, you should call
384  *        SDL_GetNumAllocations() and be very careful if it returns non-zero.
385  *        That means that your free function will be called with memory
386  *        allocated by the previous memory allocation functions.
387  */
388 extern DECLSPEC int SDLCALL SDL_SetMemoryFunctions(SDL_malloc_func malloc_func,
389                                                    SDL_calloc_func calloc_func,
390                                                    SDL_realloc_func realloc_func,
391                                                    SDL_free_func free_func);
392 
393 /**
394  *  \brief Get the number of outstanding (unfreed) allocations
395  */
396 extern DECLSPEC int SDLCALL SDL_GetNumAllocations(void);
397 
398 extern DECLSPEC char *SDLCALL SDL_getenv(const char *name);
399 extern DECLSPEC int SDLCALL SDL_setenv(const char *name, const char *value, int overwrite);
400 
401 extern DECLSPEC void SDLCALL SDL_qsort(void *base, size_t nmemb, size_t size, int (*compare) (const void *, const void *));
402 
403 extern DECLSPEC int SDLCALL SDL_abs(int x);
404 
405 /* !!! FIXME: these have side effects. You probably shouldn't use them. */
406 /* !!! FIXME: Maybe we do forceinline functions of SDL_mini, SDL_minf, etc? */
407 #define SDL_min(x, y) (((x) < (y)) ? (x) : (y))
408 #define SDL_max(x, y) (((x) > (y)) ? (x) : (y))
409 
410 extern DECLSPEC int SDLCALL SDL_isdigit(int x);
411 extern DECLSPEC int SDLCALL SDL_isspace(int x);
412 extern DECLSPEC int SDLCALL SDL_isupper(int x);
413 extern DECLSPEC int SDLCALL SDL_islower(int x);
414 extern DECLSPEC int SDLCALL SDL_toupper(int x);
415 extern DECLSPEC int SDLCALL SDL_tolower(int x);
416 
417 extern DECLSPEC void *SDLCALL SDL_memset(SDL_OUT_BYTECAP(len) void *dst, int c, size_t len);
418 
419 #define SDL_zero(x) SDL_memset(&(x), 0, sizeof((x)))
420 #define SDL_zerop(x) SDL_memset((x), 0, sizeof(*(x)))
421 #define SDL_zeroa(x) SDL_memset((x), 0, sizeof((x)))
422 
423 /* Note that memset() is a byte assignment and this is a 32-bit assignment, so they're not directly equivalent. */
SDL_memset4(void * dst,Uint32 val,size_t dwords)424 SDL_FORCE_INLINE void SDL_memset4(void *dst, Uint32 val, size_t dwords)
425 {
426 #ifdef __APPLE__
427     memset_pattern4(dst, &val, dwords * 4);
428 #elif defined(__GNUC__) && defined(i386)
429     int u0, u1, u2;
430     __asm__ __volatile__ (
431         "cld \n\t"
432         "rep ; stosl \n\t"
433         : "=&D" (u0), "=&a" (u1), "=&c" (u2)
434         : "0" (dst), "1" (val), "2" (SDL_static_cast(Uint32, dwords))
435         : "memory"
436     );
437 #else
438     size_t _n = (dwords + 3) / 4;
439     Uint32 *_p = SDL_static_cast(Uint32 *, dst);
440     Uint32 _val = (val);
441     if (dwords == 0)
442         return;
443     switch (dwords % 4)
444     {
445         case 0: do {    *_p++ = _val;   /* fallthrough */
446         case 3:         *_p++ = _val;   /* fallthrough */
447         case 2:         *_p++ = _val;   /* fallthrough */
448         case 1:         *_p++ = _val;   /* fallthrough */
449         } while ( --_n );
450     }
451 #endif
452 }
453 
454 extern DECLSPEC void *SDLCALL SDL_memcpy(SDL_OUT_BYTECAP(len) void *dst, SDL_IN_BYTECAP(len) const void *src, size_t len);
455 
456 extern DECLSPEC void *SDLCALL SDL_memmove(SDL_OUT_BYTECAP(len) void *dst, SDL_IN_BYTECAP(len) const void *src, size_t len);
457 extern DECLSPEC int SDLCALL SDL_memcmp(const void *s1, const void *s2, size_t len);
458 
459 extern DECLSPEC size_t SDLCALL SDL_wcslen(const wchar_t *wstr);
460 extern DECLSPEC size_t SDLCALL SDL_wcslcpy(SDL_OUT_Z_CAP(maxlen) wchar_t *dst, const wchar_t *src, size_t maxlen);
461 extern DECLSPEC size_t SDLCALL SDL_wcslcat(SDL_INOUT_Z_CAP(maxlen) wchar_t *dst, const wchar_t *src, size_t maxlen);
462 extern DECLSPEC wchar_t *SDLCALL SDL_wcsdup(const wchar_t *wstr);
463 extern DECLSPEC wchar_t *SDLCALL SDL_wcsstr(const wchar_t *haystack, const wchar_t *needle);
464 
465 extern DECLSPEC int SDLCALL SDL_wcscmp(const wchar_t *str1, const wchar_t *str2);
466 extern DECLSPEC int SDLCALL SDL_wcsncmp(const wchar_t *str1, const wchar_t *str2, size_t maxlen);
467 
468 extern DECLSPEC size_t SDLCALL SDL_strlen(const char *str);
469 extern DECLSPEC size_t SDLCALL SDL_strlcpy(SDL_OUT_Z_CAP(maxlen) char *dst, const char *src, size_t maxlen);
470 extern DECLSPEC size_t SDLCALL SDL_utf8strlcpy(SDL_OUT_Z_CAP(dst_bytes) char *dst, const char *src, size_t dst_bytes);
471 extern DECLSPEC size_t SDLCALL SDL_strlcat(SDL_INOUT_Z_CAP(maxlen) char *dst, const char *src, size_t maxlen);
472 extern DECLSPEC char *SDLCALL SDL_strdup(const char *str);
473 extern DECLSPEC char *SDLCALL SDL_strrev(char *str);
474 extern DECLSPEC char *SDLCALL SDL_strupr(char *str);
475 extern DECLSPEC char *SDLCALL SDL_strlwr(char *str);
476 extern DECLSPEC char *SDLCALL SDL_strchr(const char *str, int c);
477 extern DECLSPEC char *SDLCALL SDL_strrchr(const char *str, int c);
478 extern DECLSPEC char *SDLCALL SDL_strstr(const char *haystack, const char *needle);
479 extern DECLSPEC char *SDLCALL SDL_strtokr(char *s1, const char *s2, char **saveptr);
480 extern DECLSPEC size_t SDLCALL SDL_utf8strlen(const char *str);
481 
482 extern DECLSPEC char *SDLCALL SDL_itoa(int value, char *str, int radix);
483 extern DECLSPEC char *SDLCALL SDL_uitoa(unsigned int value, char *str, int radix);
484 extern DECLSPEC char *SDLCALL SDL_ltoa(long value, char *str, int radix);
485 extern DECLSPEC char *SDLCALL SDL_ultoa(unsigned long value, char *str, int radix);
486 extern DECLSPEC char *SDLCALL SDL_lltoa(Sint64 value, char *str, int radix);
487 extern DECLSPEC char *SDLCALL SDL_ulltoa(Uint64 value, char *str, int radix);
488 
489 extern DECLSPEC int SDLCALL SDL_atoi(const char *str);
490 extern DECLSPEC double SDLCALL SDL_atof(const char *str);
491 extern DECLSPEC long SDLCALL SDL_strtol(const char *str, char **endp, int base);
492 extern DECLSPEC unsigned long SDLCALL SDL_strtoul(const char *str, char **endp, int base);
493 extern DECLSPEC Sint64 SDLCALL SDL_strtoll(const char *str, char **endp, int base);
494 extern DECLSPEC Uint64 SDLCALL SDL_strtoull(const char *str, char **endp, int base);
495 extern DECLSPEC double SDLCALL SDL_strtod(const char *str, char **endp);
496 
497 extern DECLSPEC int SDLCALL SDL_strcmp(const char *str1, const char *str2);
498 extern DECLSPEC int SDLCALL SDL_strncmp(const char *str1, const char *str2, size_t maxlen);
499 extern DECLSPEC int SDLCALL SDL_strcasecmp(const char *str1, const char *str2);
500 extern DECLSPEC int SDLCALL SDL_strncasecmp(const char *str1, const char *str2, size_t len);
501 
502 extern DECLSPEC int SDLCALL SDL_sscanf(const char *text, SDL_SCANF_FORMAT_STRING const char *fmt, ...) SDL_SCANF_VARARG_FUNC(2);
503 extern DECLSPEC int SDLCALL SDL_vsscanf(const char *text, const char *fmt, va_list ap);
504 extern DECLSPEC int SDLCALL SDL_snprintf(SDL_OUT_Z_CAP(maxlen) char *text, size_t maxlen, SDL_PRINTF_FORMAT_STRING const char *fmt, ... ) SDL_PRINTF_VARARG_FUNC(3);
505 extern DECLSPEC int SDLCALL SDL_vsnprintf(SDL_OUT_Z_CAP(maxlen) char *text, size_t maxlen, const char *fmt, va_list ap);
506 
507 #ifndef HAVE_M_PI
508 #ifndef M_PI
509 #define M_PI    3.14159265358979323846264338327950288   /**< pi */
510 #endif
511 #endif
512 
513 extern DECLSPEC double SDLCALL SDL_acos(double x);
514 extern DECLSPEC float SDLCALL SDL_acosf(float x);
515 extern DECLSPEC double SDLCALL SDL_asin(double x);
516 extern DECLSPEC float SDLCALL SDL_asinf(float x);
517 extern DECLSPEC double SDLCALL SDL_atan(double x);
518 extern DECLSPEC float SDLCALL SDL_atanf(float x);
519 extern DECLSPEC double SDLCALL SDL_atan2(double x, double y);
520 extern DECLSPEC float SDLCALL SDL_atan2f(float x, float y);
521 extern DECLSPEC double SDLCALL SDL_ceil(double x);
522 extern DECLSPEC float SDLCALL SDL_ceilf(float x);
523 extern DECLSPEC double SDLCALL SDL_copysign(double x, double y);
524 extern DECLSPEC float SDLCALL SDL_copysignf(float x, float y);
525 extern DECLSPEC double SDLCALL SDL_cos(double x);
526 extern DECLSPEC float SDLCALL SDL_cosf(float x);
527 extern DECLSPEC double SDLCALL SDL_exp(double x);
528 extern DECLSPEC float SDLCALL SDL_expf(float x);
529 extern DECLSPEC double SDLCALL SDL_fabs(double x);
530 extern DECLSPEC float SDLCALL SDL_fabsf(float x);
531 extern DECLSPEC double SDLCALL SDL_floor(double x);
532 extern DECLSPEC float SDLCALL SDL_floorf(float x);
533 extern DECLSPEC double SDLCALL SDL_trunc(double x);
534 extern DECLSPEC float SDLCALL SDL_truncf(float x);
535 extern DECLSPEC double SDLCALL SDL_fmod(double x, double y);
536 extern DECLSPEC float SDLCALL SDL_fmodf(float x, float y);
537 extern DECLSPEC double SDLCALL SDL_log(double x);
538 extern DECLSPEC float SDLCALL SDL_logf(float x);
539 extern DECLSPEC double SDLCALL SDL_log10(double x);
540 extern DECLSPEC float SDLCALL SDL_log10f(float x);
541 extern DECLSPEC double SDLCALL SDL_pow(double x, double y);
542 extern DECLSPEC float SDLCALL SDL_powf(float x, float y);
543 extern DECLSPEC double SDLCALL SDL_scalbn(double x, int n);
544 extern DECLSPEC float SDLCALL SDL_scalbnf(float x, int n);
545 extern DECLSPEC double SDLCALL SDL_sin(double x);
546 extern DECLSPEC float SDLCALL SDL_sinf(float x);
547 extern DECLSPEC double SDLCALL SDL_sqrt(double x);
548 extern DECLSPEC float SDLCALL SDL_sqrtf(float x);
549 extern DECLSPEC double SDLCALL SDL_tan(double x);
550 extern DECLSPEC float SDLCALL SDL_tanf(float x);
551 
552 /* The SDL implementation of iconv() returns these error codes */
553 #define SDL_ICONV_ERROR     (size_t)-1
554 #define SDL_ICONV_E2BIG     (size_t)-2
555 #define SDL_ICONV_EILSEQ    (size_t)-3
556 #define SDL_ICONV_EINVAL    (size_t)-4
557 
558 /* SDL_iconv_* are now always real symbols/types, not macros or inlined. */
559 typedef struct _SDL_iconv_t *SDL_iconv_t;
560 extern DECLSPEC SDL_iconv_t SDLCALL SDL_iconv_open(const char *tocode,
561                                                    const char *fromcode);
562 extern DECLSPEC int SDLCALL SDL_iconv_close(SDL_iconv_t cd);
563 extern DECLSPEC size_t SDLCALL SDL_iconv(SDL_iconv_t cd, const char **inbuf,
564                                          size_t * inbytesleft, char **outbuf,
565                                          size_t * outbytesleft);
566 /**
567  *  This function converts a string between encodings in one pass, returning a
568  *  string that must be freed with SDL_free() or NULL on error.
569  */
570 extern DECLSPEC char *SDLCALL SDL_iconv_string(const char *tocode,
571                                                const char *fromcode,
572                                                const char *inbuf,
573                                                size_t inbytesleft);
574 #define SDL_iconv_utf8_locale(S)    SDL_iconv_string("", "UTF-8", S, SDL_strlen(S)+1)
575 #define SDL_iconv_utf8_ucs2(S)      (Uint16 *)SDL_iconv_string("UCS-2-INTERNAL", "UTF-8", S, SDL_strlen(S)+1)
576 #define SDL_iconv_utf8_ucs4(S)      (Uint32 *)SDL_iconv_string("UCS-4-INTERNAL", "UTF-8", S, SDL_strlen(S)+1)
577 
578 /* force builds using Clang's static analysis tools to use literal C runtime
579    here, since there are possibly tests that are ineffective otherwise. */
580 #if defined(__clang_analyzer__) && !defined(SDL_DISABLE_ANALYZE_MACROS)
581 
582 /* The analyzer knows about strlcpy even when the system doesn't provide it */
583 #ifndef HAVE_STRLCPY
584 size_t strlcpy(char* dst, const char* src, size_t size);
585 #endif
586 
587 /* The analyzer knows about strlcat even when the system doesn't provide it */
588 #ifndef HAVE_STRLCAT
589 size_t strlcat(char* dst, const char* src, size_t size);
590 #endif
591 
592 #define SDL_malloc malloc
593 #define SDL_calloc calloc
594 #define SDL_realloc realloc
595 #define SDL_free free
596 #define SDL_memset memset
597 #define SDL_memcpy memcpy
598 #define SDL_memmove memmove
599 #define SDL_memcmp memcmp
600 #define SDL_strlcpy strlcpy
601 #define SDL_strlcat strlcat
602 #define SDL_strlen strlen
603 #define SDL_wcslen wcslen
604 #define SDL_wcslcpy wcslcpy
605 #define SDL_wcslcat wcslcat
606 #define SDL_strdup strdup
607 #define SDL_wcsdup wcsdup
608 #define SDL_strchr strchr
609 #define SDL_strrchr strrchr
610 #define SDL_strstr strstr
611 #define SDL_wcsstr wcsstr
612 #define SDL_strtokr strtok_r
613 #define SDL_strcmp strcmp
614 #define SDL_wcscmp wcscmp
615 #define SDL_strncmp strncmp
616 #define SDL_wcsncmp wcsncmp
617 #define SDL_strcasecmp strcasecmp
618 #define SDL_strncasecmp strncasecmp
619 #define SDL_sscanf sscanf
620 #define SDL_vsscanf vsscanf
621 #define SDL_snprintf snprintf
622 #define SDL_vsnprintf vsnprintf
623 #endif
624 
625 SDL_FORCE_INLINE void *SDL_memcpy4(SDL_OUT_BYTECAP(dwords*4) void *dst, SDL_IN_BYTECAP(dwords*4) const void *src, size_t dwords)
626 {
627     return SDL_memcpy(dst, src, dwords * 4);
628 }
629 
630 /* Ends C function definitions when using C++ */
631 #ifdef __cplusplus
632 }
633 #endif
634 #include "close_code.h"
635 
636 #endif /* SDL_stdinc_h_ */
637 
638 /* vi: set ts=4 sw=4 expandtab: */
639